From: Jiri Slaby <jslaby@suse.cz>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>,
alan@linux.intel.com, linux-kernel@vger.kernel.org,
jirislaby@gmail.com, Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux390@de.ibm.com, linux-s390@vger.kernel.org
Subject: Re: [PATCH 25/69] TTY: con3215, remove tasklet for tty_wakeup
Date: Mon, 09 Apr 2012 20:30:23 +0200 [thread overview]
Message-ID: <4F832ABF.4060509@suse.cz> (raw)
In-Reply-To: <20120409182720.GA12044@kroah.com>
On 04/09/2012 08:27 PM, Greg KH wrote:
> On Tue, Apr 03, 2012 at 09:59:19AM +0200, Jiri Slaby wrote:
>> On 04/03/2012 07:42 AM, Heiko Carstens wrote:
>>> On Mon, Apr 02, 2012 at 01:54:09PM +0200, Jiri Slaby wrote:
>>>> tty_wakeup is safe to be called from all contexts. No need to schedule
>>>> a tasklet for that. Let us call it directly like in other drivers.
>>>>
>>>> And delete the tasklet completely.
>>>
>>> Your patch actually reverts Martin's recent commit 656d912537
>>> "[S390] 3215 deadlock with tty_wakeup".
>>> I'm quite sure the reason for the deadlock still exists.
>>> Unfortunately the commit doesn't contain the call chain that
>>> led to fix.
>>
>> Ok, I would really appreciate the trace.
>>
>> If this is really an issue, we should provide a helper in the TTY layer
>> like tty_schedule_wakeup.
>
> Jiri, should I not apply this patch?
Yes, please skip it until this is sorted out. And also the other con3215
patches if they don't apply cleanly now.
thanks,
--
js
suse labs
next prev parent reply other threads:[~2012-04-09 18:30 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-02 11:53 [PATCH 00/69] TTY buffer in tty_port -- prep no. 2 Jiri Slaby
2012-04-02 11:53 ` [PATCH 01/69] TTY: crisv10, remove unused tmp_buf Jiri Slaby
2012-04-03 11:47 ` Jesper Nilsson
2012-04-02 11:53 ` [PATCH 02/69] TTY: crisv10, initialize tty_port Jiri Slaby
2012-04-03 11:47 ` Jesper Nilsson
2012-04-02 11:53 ` [PATCH 03/69] TTY: deprecate linux/generic_serial.h Jiri Slaby
2012-04-02 11:53 ` [PATCH 04/69] ISDN: i4l, remove cvs crap Jiri Slaby
2012-04-02 11:53 ` [PATCH 05/69] TTY: isdn, remove callout Jiri Slaby
2012-04-02 11:53 ` [PATCH 06/69] TTY: isdn, remove ISDN_ASYNC_* flags Jiri Slaby
2012-04-02 11:53 ` [PATCH 07/69] TTY: isdn, do not play with module refcounts Jiri Slaby
2012-04-02 11:53 ` [PATCH 08/69] TTY: isdn, make some functions readable Jiri Slaby
2012-04-02 11:53 ` [PATCH 09/69] TTY: isdn, remove unused members from modem_info Jiri Slaby
2012-04-02 11:53 ` [PATCH 10/69] TTY: isdn, add tty_port Jiri Slaby
2012-04-02 11:53 ` [PATCH 11/69] TTY: isdn, use open/close_wait from tty_port Jiri Slaby
2012-04-02 11:53 ` [PATCH 12/69] TTY: isdn, use counts " Jiri Slaby
2012-04-02 11:53 ` [PATCH 13/69] TTY: isdn, use tty " Jiri Slaby
2012-04-02 11:53 ` [PATCH 14/69] TTY: isdn, use xmit_buf " Jiri Slaby
2012-04-02 11:53 ` [PATCH 15/69] TTY: isdn, define local tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 16/69] TTY: isdn, use tty_port_close_end helper Jiri Slaby
2012-04-02 11:54 ` [PATCH 17/69] TTY: isdn, define tty_port_operations Jiri Slaby
2012-04-02 11:54 ` [PATCH 18/69] TTY: isdn, use tty_port_block_til_ready helper Jiri Slaby
2012-04-02 11:54 ` [PATCH 19/69] TTY: hso, do not set TTY MAGIC Jiri Slaby
2012-04-02 11:54 ` [PATCH 20/69] TTY: hso, free tty_driver Jiri Slaby
2012-04-02 11:54 ` [PATCH 21/69] TTY: hso, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 22/69] TTY: hso, remove tty NULL checks fro tty->ops Jiri Slaby
2012-04-02 11:54 ` [PATCH 23/69] TTY: hso, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 24/69] TTY: con3215, centralize allocation Jiri Slaby
2012-04-03 5:56 ` Heiko Carstens
2012-04-02 11:54 ` [PATCH 25/69] TTY: con3215, remove tasklet for tty_wakeup Jiri Slaby
2012-04-03 5:42 ` Heiko Carstens
2012-04-03 7:59 ` Jiri Slaby
2012-04-09 18:27 ` Greg KH
2012-04-09 18:30 ` Jiri Slaby [this message]
2012-04-09 19:07 ` Greg KH
2012-04-02 11:54 ` [PATCH 26/69] TTY: con3215, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 27/69] TTY: con3215, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 28/69] TTY: sclp_tty, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 29/69] TTY: sclp_vt220, " Jiri Slaby
2012-04-02 11:54 ` [PATCH 30/69] TTY: sclp_vt220, remove unused allocation Jiri Slaby
2012-04-02 11:54 ` [PATCH 31/69] TTY: tty3270, move initialization to allocation Jiri Slaby
2012-04-02 11:54 ` [PATCH 32/69] TTY: tty3270, get rid of ugly aliasing Jiri Slaby
2012-04-02 11:54 ` [PATCH 33/69] TTY: tty3270, push tty down to tty3270_do_write Jiri Slaby
2012-04-02 11:54 ` [PATCH 34/69] TTY: tty3270, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 35/69] TTY: bfin_jtag_comm, " Jiri Slaby
2012-04-02 11:54 ` [PATCH 36/69] TTY: bfin_jtag_comm, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 37/69] TTY: HVC, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 38/69] TTY: HVC, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 39/69] TTY: HVC, use count " Jiri Slaby
2012-04-02 11:54 ` [PATCH 40/69] TTY: hvcs, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 41/69] TTY: hvcs, use kref from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 42/69] TTY: hvcs, use tty " Jiri Slaby
2012-04-02 11:54 ` [PATCH 43/69] TTY: hvsi, CLOCAL is not in tty->flags Jiri Slaby
2012-04-02 11:54 ` [PATCH 44/69] TTY: hvsi, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 45/69] TTY: hvsi, sanitize uses of tty Jiri Slaby
2012-04-02 11:54 ` [PATCH 46/69] TTY: hvsi, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 47/69] TTY: ipwireless, use synchronous hangup Jiri Slaby
2012-04-02 12:42 ` David Sterba
2012-04-02 11:54 ` [PATCH 48/69] TTY: ipwireless, move prints to appropriate places Jiri Slaby
2012-04-02 11:54 ` [PATCH 49/69] TTY: ipwireless, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 50/69] TTY: ipwireless, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 51/69] TTY: 68328serial, remove serial_state and friends Jiri Slaby
2012-04-03 12:48 ` Geert Uytterhoeven
2012-04-02 11:54 ` [PATCH 52/69] TTY: 68328serial, remove unused stuff from m68k_serial Jiri Slaby
2012-04-02 11:54 ` [PATCH 53/69] TTY: 68328serial, remove garbage Jiri Slaby
2012-04-02 11:54 ` [PATCH 54/69] TTY: 68328serial, use ulong flags for interrupts status Jiri Slaby
2012-04-02 11:54 ` [PATCH 55/69] TTY: 68328serial, remove 68328serial.h Jiri Slaby
2012-04-02 11:54 ` [PATCH 56/69] TTY: 68328serial, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 57/69] TTY: 68328serial, use open/close_wait from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 58/69] TTY: 68328serial, use close_delay/closing_wait " Jiri Slaby
2012-04-02 11:54 ` [PATCH 59/69] TTY: 68328serial, use flags " Jiri Slaby
2012-04-02 11:54 ` [PATCH 60/69] TTY: 68328serial, propagate tty Jiri Slaby
2012-04-02 11:54 ` [PATCH 61/69] TTY: 68328serial, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 62/69] TTY: 68328serial, use tty_port_block_til_ready Jiri Slaby
2012-04-04 12:25 ` Greg Ungerer
2012-04-02 11:54 ` [PATCH 63/69] TTY: usb/u_serial, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 64/69] TTY: usb/u_serial, use tty from tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 65/69] TTY: usb/u_serial use close_wait " Jiri Slaby
2012-04-02 11:54 ` [PATCH 66/69] TTY: rfcomm/tty, add tty_port Jiri Slaby
2012-04-02 11:54 ` [PATCH 67/69] TTY: rfcomm/tty, use tty_port refcounting Jiri Slaby
2012-04-02 11:54 ` [PATCH 68/69] TTY: rfcomm/tty, remove work for tty_wakeup Jiri Slaby
2012-04-02 11:54 ` [PATCH 69/69] TTY: rfcomm/tty, use count from tty_port Jiri Slaby
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4F832ABF.4060509@suse.cz \
--to=jslaby@suse.cz \
--cc=alan@linux.intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=heiko.carstens@de.ibm.com \
--cc=jirislaby@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux390@de.ibm.com \
--cc=schwidefsky@de.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).